The mayors of San Fransisco; Los Angeles; Washington, DC;
and Boston all pitchedthe United States Olympic
Committee (USOC) today, making the case for their city. The US
can choose only one to represent the country in the official
bidding process.

Each Games,
every national committee must give the International Olympic
Committee (IOC) the name of one city. In some cases, the
individual country even carries out its own selection process
from interested hosts. After that, the IOC splits the two-year
bidding process into two parts, both with rigorous questioning.

Contenders must submit their bids by
Sept. 15, 2015. The IOC will choose the final host in Lima,
Peru in 2017.